Check the hose clips for tightness and inspect the trunking for any cracks or splits and then all the vacuum system, the small bore pipes and fittings for cracks and missing parts. The best mannerism to locate a leak is to have the engine paperwork and hot and subsequently spray can lighter gas /propane or brake cleaner approximately each joint in turn. If the engine rev s in the works you ve found your leak.
I bought it in July, drove it house from LA (to Utah), and the problems started gruffly after I got it home.Any further back up you can offer is appreciated. I don't know what else to complete but receive it back up to the dealer. I know I've got the shop foreman committed upon it at the dealer, but I yet mood its pushed to the back as its archaic and everyone loses in this situation.
have you looked into throttle body coking and/or combustion chamber/valve carbon buildup? are you going on to date on all maintenance; spark plugs fuel filter pcv vlave etc? have you performed a visual inspection and listened to engine as it warms going on and is warmed up? oftentimes in engine take steps many factors may cause the similar symptom(s)